Atlantic Menhaden Identification Guide

Key identification features

• Deep, laterally compressed body with a notably large head relative to body size compared to other herrings
• One large dark spot just behind the gill cover, often followed by several smaller, irregular spots scattered along the upper side
• Strongly serrated, sharp-edged scutes forming a pronounced keel along the entire belly
• Deeply forked tail and yellowish-green to brassy back fading to bright silver on the flanks
• No visible lateral line; adults commonly reach 25-38 cm

Common look-alikes

• Gizzard shad — has a long, whip-like trailing filament on the last dorsal fin ray that menhaden completely lacks
• American shad — smaller head and less bulky body, with a more defined single-spot-plus-row pattern
• Atlantic herring — much smaller head, no shoulder spot, and a weaker, less serrated belly keel

Where you'll see one

Atlantic menhaden form enormous, tightly packed surface schools in estuaries and open coastal waters from Nova Scotia to Florida, filter-feeding on plankton as they move along the Atlantic seaboard with the seasons.